Back to Home
  • FAQs
  • CONTACT US
  • SITEMAP
  • COOKIE POLICY
  • GEANT GATEWAY
  • About GEANT
    • Partners
      • NREN Development and Support
    • Governance and Management
      • Partners' Assembly
      • Executive Board
    • Activities
    • European e-Infrastructure
      • Europe 2020 and GEANT
      • GEANT Expert Group
      • Women in ICT
    • Value of GEANT
      • History of GEANT
  • Network
    • The Network
    • Network Operations
      • Operations Teams
      • Operations Centre
      • Network Security
    • Global Connectivity
      • Global Connectivity: The Benefits
      • Global Connectivity: World Regions
      • Global Users and Applications
      • How to Connect to the network
      • Global Service Collaboration
    • Research and Education Networks
    • Campus Best Practice
    • Environmental Impact
      • Carbon accounting
      • Adopting a Greener Corporate Outlook
      • Events & Case Studies
      • Sustainability Policy
  • Innovation
    • Research Programmes
      • Network Architectures for Horizon 2020
      • Technology Testing for Specific Service Applications
      • Identity and Trust Technologies for GEANT Services
    • Testbeds
    • Foresight
    • Open Call
    • Standards
  • Services
    • Connectivity Services
      • GEANT IP
      • GEANT L3VPN
      • GEANT Plus
      • GEANT Lambda
      • GEANT Open
      • GEANT Bandwidth on Demand
      • GEANT Testbeds Service
    • Network Performance Services
      • perfSONAR
      • eduPERT
      • GEANT Security
      • GEANT Framework
    • User Access and Applications
      • eduroam
      • eduGAIN
      • eduPKI
      • eduCONF
    • Cloud Services
    • Services Registration Authority
      • SSL Certificates
      • Request a Certificate
    • Namespace Registry
      • urn:geant Registry
      • URN: FAQs
      • URN: Request Form
      • geant.net/uri Registry
    • Training
      • GEANT Showcase
  • Users
    • Health and Medicine
      • DECIDE
      • neuGRID
      • OutGRID
      • Sim-e-Child
      • TEMDEC
      • ITHANET
      • EMBL-EBI
    • Energy
      • CAREN
      • ITER
    • Earth Observation
      • PAGASA
      • EMSA
      • CAREN glaciers
      • TIGGE and GEANT
      • THEOS and GEANT
    • Particle Physics
      • LHCOPN
      • LHCONE
      • BELLE II and GEANT
    • Space
      • GEANT and ORIENTplus
      • EXPReS Project
      • NEXPReS
    • Society
      • Sichuan earthquake
    • Arts and Education
      • ShanghAI Lectures
      • LOLA
      • ASTRA Project
      • perfSONAR MDM
      • Opera Oberta
      • e-Education
    • Horizon 2020
    • User Advisory Committee
    • User Support
    • User Posters
  • News & Events
    • News
      • News Archive - 2013
      • Press coverage
    • Events
      • TNC 2015
    • CONNECT magazine
      • Archived Issues
    • Representing GEANT
    • Press Kit
    • Follow Us
  • Resources
    • Deliverables
    • Open Call deliverables
    • White Papers
    • Knowledge Sharing
    • Media Library
      • GEANT Case Studies
      • GEANT Media Library: Project videos
      • GEANT Media Library: Interviews
      • GEANT Showcase Presentations
      • GEANT Media Library: Audio
      • GEANT Media Library: Maps
      • GEANT Media Library: Brochures
      • GEANT Media Library: Presentations
      • User Posters
    • Partner Resources
      • Exhibition Stands
      • Image Library
    • Intellectual Property
  • Open Call
    • About
    • Applications and Tools
    • Authentication
    • Network Architecture and Optical Projects
    • Software Defined Networking
    • Videos

Arts and Education
Energy
Earth Observation
Health and Medicine
Horizon 2020
Particle Physics
Society
Space

Support for LHCONE

With the successful operation of the LHC accelerator and the start of the data analysis, there has come a re-evaluation of the computing and data models of the experiments. The goal of LHCONE (LHC Open Network Environment) is to ensure better access to the most important datasets by the worldwide HEP (High Energy Physics) community and hence improve the data analysis.

To effect this, several steps have been taken including:

  • flattening the strict Tier1-Tier2-Tier3 hierarchy MONARC model so that any site may connect with any other;
  • revisiting the implementation of strategic data placement;
  • reinforcing the use of dataset caching – rather like the caching of web pages.

These requirements and concepts are outlined in the Network Requirements document, published in September 2010 by K. Bos and I. Fisk.

Although the operation of the LHCOPN remains the same, moving data between Tier0-Tier1 and Tier1-Tier1, the steps mentioned above have altered the traffic patterns to the extent that substantial data transfers between major sites are regularly being observed on the national and GÉANT IP backbones, often lasting for several days. This traffic is not just a few high bandwidth flows but often made up of many small flows – the users have learnt how to use gridftp very effectively.

These changes have been discussed at the LHCOPN meetings and at a dedicated meeting in January 2011 between the experimenters and the NRENs. Several suggestions were presented and discussed on how to find a way forward. At the LHCOPN meeting in Lyon during February a draft architecture document for LHCONE was constructed, and subsequently revised, taking into account the user requirements and design input from the academic network community.

The main principle was to separate the LHC traffic, thus avoiding degraded performance both to the LHC community and to the other users of the academic IP networks. Doing nothing is not an option as it would almost certainly result in a serious impact on all network users.

Also at the Lyon meeting it was suggested to build a prototype, as documented in “LHCONE prototype planning”. This is to involve a limited number of sites in parallel with deriving a suitable implementation document. The sites important for the prototype are suggested in the document, “A Use Case for the LHC Open Network Environment”.  

  

  • GEANT
  • EU flag
  • European Commission Communications Networks, Content and Technology
  • Copyright
  • Credits
  • Legal